The rule of product says that Select one: O a. the number of ways to choose an ordered pair is the number of ways to choose the first element plus the number of ways to choose the second element. b. the number of ways to choose a set of two elements is the number of ways to choose the first element times the numb of ways to choose the second element. c. None of the mentioned answers. O d. the number of ways to choose an ordered pair is the number of ways to choose the first element times the number of ways to choose the second element